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Wheat head blight is still a problem that influences wheat production this year

Wheat head blight has always been the biggest problem that influence wheat production in China. In 2017, the occurrence of head blight in Henan province and Anhui province hit an accumulative area of 3.67 million hectare, which caused a great loss of production. After infected with head blight, the wheat quality is reduced and the rate of flour production could be reduced as well. Thus the wheat can neither be eaten nor processed, but has to be treated separately.


In view of the serious damage of wheat head blight in recent years, it has attracted the attention of agricultural sector and farmers who has taken a series of measures at the same time. However, through actual investigation, it was found that the prevention and control on head blight by farmers has not reached good result.


It is expected that the occurrence area of wheat head blight in 2018 will become larger because wheat planting was relatively late in last year. According to years of experience, it has been found that late-planting (late-maturing) wheat has a high incidence of head blight. The National Agricultural Technology Promotion Center predicts an area of 6.67 million hectare of wheat head blight in 2018.


For the prevention and control of wheat head blight, comprehensive factors need to be considered. But among farmers, there are still many misunderstandings in its prevention and control:


1. Farmers are now able to distinguish the incidence of head blight according to the weather conditions. However, neglecting the humidity and variety factors in the field, farmers can not effectively prevent and control wheat head blight.


2, Farmers can not seize the best prevention time. When head blight is about to occur, spraying should be carried out sooner rather than later.


3、The effect of prevention fungicides decreases. As of March 23, 2018, the Ministry of Pesticides had registered 349 registrations for the control of head blight, of which 176 were carbendazim and its compounds, and 81 were thiophanate-methyl and its compounds. The earliest use of carbendazim and other benzimidazole fungicides was one of the key measures for the prevention and control of wheat head blight in the mid-20th century. However, with the increase of the years of use, wheat head blight has been severely resistant to these fungicides. According to investigations by relevant professional departments, resistance has spread from Zhejiang region to most of the Shanghai and Jiangsu region. Therefore, it is recommended to use a mixture of fungicides with different mechanisms of action (ensure that the fungicides used have multiple functions of systemic absorption and protection eradication) to prevent the spread of disease.


Experts suggest that farmers can use compounding fungicides of tebuconazole + prochloraz which have the effects of uptake and transmission, protectiveness and therapeutic action in plants. In addition, it can also promote the growth of crops, achieving the effect of preventing disease, improving quality and increasing production, with long effective period.


In the past two years, many companies have focused their attention on tebuconazole + prochloraz, and started to carry out registration and tests of relevant documents. By March 23, 2018, there have been a total of 35 tebuconazole + prochloraz registration certificates (22 control subjects were head blight).




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